气象2023，Vol.49Issue(11)：1414-1420,7.DOI:10.7519/j.issn.1000-0526.2023.092701
2023年8月大气环流和天气分析
Analysis of the August 2023 Atmospheric Circulation and Weather
摘要
Abstract
The main characteristics of the general atmospheric circulation in August 2023 are as follows.The intensity of the polar vortex was slightly stronger in the Northern Hemisphere.The circulation over the mid-to-high latitudes of Asia at 500 hPa showed"two troughs"and"one ridge".The high-altitude trough affecting the northeastern and northern of China is stronger.The mean location of the ridge line in the western part of the Western Pacific subtropical high was more southward compared to that in normal years.In August,the monthly average temperature was 21.9℃,0.8 C higher than in the same period of normal years(21.1℃).The monthly average precipitation was 110.9 mm,which is 3.5％higher than normal(107.1 mm).During this month,the high temperature days were more than normal,with regional high temperature processes appearing successively in China.Meteorological drought continued to in the northwest and northeast of China.Six torrential rain events were reported in China.In August,six ty-phoons were active in the South China Sea and the Western North Pacific.The generation number of tropi-cal cyclones was higher than that in the previous years,but the number of landfall typhoons was lower than usual.Severe convective weather was frequent and local disasters were severe.In addition,one torna-do hit the Dafeng District,Yancheng of Jiangsu Province.关键词
大气环流/副热带高压/台风/高温/强对流Key words
atmospheric circulation/subtropical high/typhoon/high temperature/severe convection分类
天文与地球科学引用本文复制引用
运晓博,杨寅,刘海知..2023年8月大气环流和天气分析[J].气象,2023,49(11):1414-1420,7.基金项目
新疆维吾尔自治区重点研发任务专项(2022B03027-3)资助 （2022B03027-3）
